Mon 26 Oct, 2015 05:49 am - http://genetics.thetech.org/ask-a-geneticist/twins-different-blood-types
Refer this link it explain the possibilities of twins have different blood groups (view)
Mon 26 Oct, 2015 05:37 am - Hi amtotheber,
When parents(both) have B+ blood group the possibilities of baby blood group is B+ or O...There is possibilities for twins have different blood group... (view)